Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddb5c8dbd4a66d65…

MALICIOUS

PDF

48.7 KB Created: 2021-06-07 09:43:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 0415af6ed038efd10bd22cf4eadd594e SHA-1: 8de14eb7121455734661a33ae22283973ad47ab8 SHA-256: ddb5c8dbd4a66d65820b4cb1c9abbbcc3bd08729a8763da5b1a60bb2fdac6465
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-severity heuristic indicating it links to a game hack redirector, specifically mentioning 'astuce-anti-hack-roblox-game-hack'. The document body, though heavily obfuscated, contains references to 'Roblox' and a URL that aligns with the heuristic findings. The presence of embedded URLs and the nature of the lure suggest an attempt to redirect users to a malicious site, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.tw/app/431946152/astuce-anti-hack-roblox-game-hack PDF link annotation
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/coin-master-free-spin-and-coin-link-app_GM406889139.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/coin-master-links-for-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/rbx-hut_GM431946152.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/minecraft-pe-free-apk_GM479516143.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/game-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/coin-master-hack-ios-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/coin-master-hack-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/roblox-bux-free_GM431946152.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/can-i-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/coin-master-free-spins-2021-generator_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005010.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5010 27152 bytes
SHA-256: 5b47409e6c4583ce23fc647747a7a53f3820124909b16469926c5c229f1f04d6
font_01_sfnt_off00008e16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E16 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off00009abe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9ABE 18544 bytes
SHA-256: bb4e4ee51d9dd64cf04469737b678577318b80cd60d3e866300e9b4af4b52a6e

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